ITAST (Iranian Textile Association of Science and Technology) Journal of Textiles and Polymers 2322-5203 9 2 2021 06 01 Reinforcing Concrete Columns with Winding Technique Using Weft Knitted Structure تقویت ستون های بتنی با روش دورپیچی با استفاده از پارچه حلقوی پودی 15 25 131323 EN Nastaran Hemmatinezhad AUT Ali-Asghar Asgharian Jeddi AUT Hossein Molavi AUT Journal Article Reinforcement of civil structures that do not have sufficient resistance to the applied loads is of particular<br />importance. There are several ways to reinforce concrete structures so far. One of these methods is to use<br />winding technique on a concrete structure with a fabric. In this study, first, rib knitted structures with and<br />without weft inserted yarn were fabricated with two types of ordinary and high tenacity polyester yarn<br />(with a low and high modulus). Then concrete columns were made and winded using produced fabrics<br />with and without tension. The compression test was carried out on the winded columns. The results show<br />that with increasing tensile modulus of the fabric (such as weft inserted rib fabric with high tenacity<br />polyester yarn) the compressive strength of the concrete columns increases. Accordingly, while the<br />sample had only 7.52% weight increase and 8.75% increase in diameter compared to the control sample,<br />the bearing capacity of the column showed an increase of 88.55% compared to the control sample. Also,<br />the compressive strength of concrete column is increased by increasing the number of layers winded<br />around the concrete column. http://www.itast.ir/article_131323_fea7ab8c1b7893af9c117fa80b5035aa.pdf